Bb tenor trombone series TB502. The tool is equipped with a 13.34 mm bore. The instrument is made of brass in a gold-metal design with a baffle with a diameter of 203 mm. The inner reducer is nickel-plated, which makes it very durable and offers a fast and sensitive reaction. The instrument also comes with an elegant and light case with shoulder straps and Vincent Bach 6 1/2 AL sleeve.